From 5d3ecc8aa8eb3dc677d5214464a0b01e7b5e1d26 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 5 Dec 2017 17:35:08 +0300
Subject: [PATCH] ath9k_htc: Add a sanity check in ath9k_htc_ampdu_action()

commit 413fd2f5c0233d3cde391679b967c1f14cd2cb27 upstream.

Smatch generates a warning here:

    drivers/net/wireless/ath/ath9k/htc_drv_main.c:1688 ath9k_htc_ampdu_action()
    error: buffer overflow 'ista->tid_state' 8 <= 15

I don't know if it's a real bug or not but the other paths through this
function all ensure that "tid" is less than ATH9K_HTC_MAX_TID (8) so
checking here makes things more consistent.

Fixes: fb9987d0f748 ("ath9k_htc: Support for AR9271 chipset.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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